code: def step_start(self):
      import os
      import sys
  
      self.test_attempt = current.retry_count
      sys.stdout.write("stdout testing logs %d\n" % self.test_attempt)
      sys.stderr.write("stderr testing logs %d\n" % self.test_attempt)
      if self.test_attempt < 3:
          self.invisible = True
          raise TestRetry()
  
file_path: metaflow/test/core/tests/tag_catch.py
imports: from metaflow_test import MetaflowTest, ExpectationFailed, steps, tag
  from metaflow import current
label_desc: Use image node_id 1 for calling the TagCatchTest obj's underlying member method code with example usage: obj.step_start() without return types